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Home/Cars/Toyota/Highlander/Third Generation (2014-2019)/my Toyota Highlander has a P0700 code what does it mean

my Toyota Highlander has a P0700 code what does it mean

Toyota Highlander Third Generation (2014-2019)

Severity: highDifficulty: mediumError Code: P07002-4 hours
3 min read
520 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix P0700 transmission control system malfunction in Toyota Highlander. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0700
Component
Transmission
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect battery before working on electrical systems.
  • ⚠Allow engine to cool before opening any components, especially near the transmission.

Symptoms

  • •Check engine light illuminated
  • •Erratic shifting or transmission slipping
  • •Transmission overheating
  • •Poor acceleration or loss of power
  • •Delayed engagement when shifting from park to drive

Diagnostic Steps

  1. 1Scan for more specific error codes using an OBD-II scanner.
  2. 2Inspect transmission fluid level and condition (look for discoloration or burnt smell).
  3. 3Check for any visible leaks around the transmission.
  4. 4Inspect wiring and connectors related to the transmission control module (TCM).
  5. 5Test the transmission control module for faults using a multimeter.
  6. 6Review service history for any previous transmission repairs or issues.

Solution

Solution

1. Preparation

  • Gather tools and parts required for repair.
  • Disconnect the negative terminal of the battery to prevent electrical shorts.
  • Allow the vehicle to cool if the engine was running.

2. Check and Replace Transmission Fluid

  • Sub-steps:
    1. Locate the transmission dipstick and remove it.
    2. Wipe the dipstick clean and reinsert it to check the fluid level.
    3. If fluid is low, add the correct type of transmission fluid as specified in the owner’s manual.
    4. If fluid is discolored or has a burnt smell, perform a fluid change.
  • Tools Required:
    • Transmission fluid pump
    • Funnel
  • Safety Warnings:
    • Ensure the vehicle is on a level surface to get an accurate fluid reading.

3. Inspect Wiring and Connectors

  • Sub-steps:
    1. Locate the TCM and inspect the wiring harness for any signs of damage or corrosion.
    2. Disconnect the connectors and clean them with electrical contact cleaner.
    3. Reconnect and ensure all connections are secure.
  • Tools Required:
    • Screwdriver set
    • Electrical contact cleaner

4. Test the Transmission Control Module (TCM)

  • Sub-steps:
    1. Use a multimeter to check voltage and ground at the TCM connector.
    2. Compare readings with the specifications in the service manual.
    3. If the TCM is faulty, proceed to replace it.
  • Tools Required:
    • Multimeter

5. Reassemble and Reconnect

  • Sub-steps:
    1. Reconnect any parts that were removed during inspection.
    2. Reconnect the negative battery terminal.
    3. Start the engine and allow it to idle.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Transmission fluid pump
  • Funnel
  • Screwdriver set
  • Electrical contact cleaner
  • Multimeter

Parts Required

  • Transmission fluid (as specified by manufacturer)
  • Transmission control module (if found faulty)

Additional Information

Error CodeP0700
Component

Transmission

Repair Time

2-4 hours

Difficulty

medium

Severity

high

Tools

6 items

Parts

2 items

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